Rep Power: 683

It's emissions time for my ride and looks like I'm in the red on NOx.

The car has been sitting for about 6 months now but is going to be used regularly soon. I had a simulation test done and once the cat. converter was lit my HC and CO levels were fine but the screen was showwing approximately 1000 ppm of NOX. I know these care have no EGR valves so let's not bother. I was thinking backing the timing of a couple degrees to cool down the conbustion charge but I'm worried the hydrocarbon and co levels will increase. Any ideas ladies and gents?

 
Rep Power: 730

how much have you driven the car since it has been sitting? alot of stock honda motors run poor when started after long periods of time. I say drive the car for a little while to clean everything out, then get your emissions. Also, check what your reading for an air fuel mixture. you want a 14.7:1 ratio.. possibly need an o2 sensor

 
Rep Power: 730

try using some methyl hydrate in the tank

 
Rep Power: 683

I will definately try driving the car around for a while using some decent gasoline. As for the 02 sensor....I'm sure it would help me in the HC and CO numbers but i doubt any change could be seen for nox. Thanks for the help.

 
Rep Power: 625

run the car at 4000 rpm on the way b4 ur etest and run seafome in ur motor works every time